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US3173712A
Expired / Lapsed
US
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O-ring or gasket seal, tapered pipe thread male connector
Assignee: Crawford Fitting Co
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Filing: 1961-04-13
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Granted: 1965-03-16
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Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 Emery J Zahuranec
- 👤 Erling G Wennerstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:58
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/006; F16L15/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US489107A
Cited
US2311009A
Cited
US2373253A
Cited
US2552686A
Cited
DE824160C
Cited
FR1063620A
Cited
US2937891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |